[PATCH v8 12/18] clk: Expose clk_hw_reparent to providers

[Tomeu Vizoso]

To be used by clock implementations for switching to a new parent during
rate change.

Signed-off-by: Tomeu Vizoso <tomeu.vizoso@xxxxxxxxxxxxx>
---
 drivers/clk/clk.c            | 8 ++++++++
 include/linux/clk-provider.h | 1 +
 2 files changed, 9 insertions(+)

diff --git a/drivers/clk/clk.c b/drivers/clk/clk.c
index eb01529..f793025 100644
--- a/drivers/clk/clk.c
+++ b/drivers/clk/clk.c
@@ -1968,6 +1968,14 @@ static void clk_core_reparent(struct clk_core *clk,
 	__clk_recalc_rates(clk, POST_RATE_CHANGE);
 }
 
+void clk_hw_reparent(struct clk_hw *hw, struct clk_hw *new_parent)
+{
+	if (!hw)
+		return;
+
+	clk_core_reparent(hw->core, !new_parent ? NULL : new_parent->core);
+}
+
 /**
  * clk_has_parent - check if a clock is a possible parent for another
  * @clk: clock source
diff --git a/include/linux/clk-provider.h b/include/linux/clk-provider.h
index 5591ea7..28abf1b 100644
--- a/include/linux/clk-provider.h
+++ b/include/linux/clk-provider.h
@@ -589,6 +589,7 @@ long __clk_mux_determine_rate_closest(struct clk_hw *hw, unsigned long rate,
 			      unsigned long max_rate,
 			      unsigned long *best_parent_rate,
 			      struct clk_hw **best_parent_p);
+void clk_hw_reparent(struct clk_hw *hw, struct clk_hw *new_parent);
 
 static inline void __clk_hw_set_clk(struct clk_hw *dst, struct clk_hw *src)
 {
-- 
2.1.0

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